Due to the variety of geometries available to antenna designers such as rectangu- lar, cylindrical, hemispherical etc., a proper practice to select the best geometry for Dielectric Resonator Antenna (DRA) is required. In this paper, various rudimentary geometries of DRA excited by a coaxial probe fed is designed and investigated for selecting the preeminent geometry of antenna. The rudimentary geometries of DRA are rectangular, cylindrical and hemispherical, which are used for investigation of DRA performance. The dielectric material used for rudi- mentary geometries is TMM10i, a ceramic thermoset polymer composite material of the Rogers high-frequency laminates.The DRA is designed to operate around 3.2 GHz. However, the resonant frequency may alter due to different rudimentary geometries. CST Microwave Studio transient solver is used to design and simulate the different rudimentary geometries of DRA.These rudi- mentary geometries of DRA give a better understanding of design parameters of an antenna and their effect on return losses, impedance bandwidth, VSWR, gain, efficiency and resonant frequency.